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Патент USA US2407195

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Sept. 3, 1946. -
R.- VON REPPERT,
2,407,195
TYPEWRITING MACHINE
Filed Feb. 17, 1944
>
BY
ATTORNEY
Patented Sept. 3, 1946
2,407,195
UNITED STATES PATENT OFFICE
‘2,401,195
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TYPEWRITIN G MACHINE
Richard Von Iteppert, Rochésgtent
Y., assignor
to International Business Machines corpora"
,tion, New York, N. Y., a corporation of New
York
Application February ‘17, 1944, Serial No. 522m
16 claims. (01. ?it-51;?)
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This invention relates to typewriting machines.
The primary object of the invention is to pro
vide an improved power operating mechanism for
o?ice machines, such as typewriter-s and type
writer computing machines.
2
like it,‘ The rays may be guided in a suitable
key comb 13 having key guide slots I3a, the ends
of which act as stops for the keys l0. ‘Also piv¢
oted on the fulcrum wire H are the sub-levers
‘
[4 tries in a_ counterclockwise direction by
springs‘ IS. ‘The ‘sub-levers M are connected by
An object is to i provide a power operating
mechanism which maybelreleased by the open
links 16 to the armsof toggle levers I? which
form part‘of the toggles [8, the other ends of
jams in a partly operated position.
v
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the toggles being pivoted on a curved fulcrum
An object is to provide a power type bar oper 10 wire 19. The toggle levers I‘! are pivoted at‘ 20
ating mechanism with means to release the power
‘ to the type bars 2| which in turn are pivoted on
ator in the event that’ the power mechanism
mechanism when it jams due to piled up type.
In the use of‘power operated typewriting ma
the curved fulcrum wire 22.
‘
When a ‘sub-lever It is actuated in a clock
wisé direction, the toggle lever I1 is actuated by
chines it quite frequently happens that the key
board is operated with the machine switch on but
with the current supply disconnected for some
cause as, for example; when the connecting cord
the link H3 in a ‘counterclockwise direction about
the pivot 2|] causing the latter and toggle lever
I‘! to travel inanv‘arc in a counterclockwise di
accidentally becomes dislodged from the electri
rection about pivotrzz“, thereby driving the type
cal outlet. This frequently happens in of?ces
bar 24, in the same direction toward the usual
when people trip over the cord or, in sweeping 20
up, the cleaners’ appliances such as brooms and
The ‘power tip'e'rating mechanism includes a
toothed member 24 carried by shaft 25 and rotat
vacuum cleaner nozzles often catch on the cord
and jerk it loose from ‘the outlet. The operator,
ing in‘the direction of the arrow while the ma
returning to the machine and not knowing that
chine is in use. The member 24 is often termed
the cord is disconnected, may turn on the switch 25 a snatch roll in the art. Pivoted on the cross
and operate a plurality of keys in rapid succes
rod 25 are tl’ié actuating lovers 2], each of which
sion before discovering the motor is not run
has one of its arms connected by a vertical link
plateh23.
ning‘ This causes the powervmechanism to be
come tripped with the result that whenthe plug
is ‘replaced in the outlet and the current supply
restored, a plurality of type bars or other devices
30
operate together and pile up or jam in the type
basket thereby stalling the motor.
As a general rule, the operators of the ma
chines are not capable of intelligently coping 35
with such a situation and in some types of power
operated typewriter, it is necessary to individually
restore to normal position the power actuating
mechanism for every type bar or device which
has been set in operation in this manner and 40
resulted in a jam. As a result, the operator often
must wait until a serviceman responds before
the machine can be restored to use.
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The object of the present invention, therefore,
is to provide a convenient means'enabling? the
operator to restore all of the tripped power mech 45
anis‘ms and resume the operation of the machine
without waiting for a serviceman.
Other objects of the invention will be ‘pointed
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23 to ‘one armof one of the sub-levers l4. Actu
ating levers 21 are urged in a clockwise direction
by‘ springs 29 against the resilient stop strip 30
preferably ‘formed of sound deadening material
such as felt orrubber.
opposite arm of‘ each actuating lever 21
has pivoted at 21d a three-arm dog 3| having a
tooth‘iild capable of engaging the teeth in the
member 2-4 but normally held clear of said teeth
by a latch pawl 32 pivoted'n'at 27b on the actuat
ing lever 21. The pawl32 normally hooks over
one arm
of the pawl 31 and both the dog 3|
and the pawl 32 are urged in a counterclockwise
direction by a (amines spring ‘33 coiled about a
pin 21c carried bythe lever Z‘Lthe branches of
the spring engaging the arm 3H) and the tail
32d of the pawl 32. The tail of pawl 32 under
lies the end of a non-repeat, release pawl 34 piv
oted at liia to a downward‘ extension lab of the
key lever Ill. A stringers, anchored to the pawl
34 and to a lug carried the extension I81), nor
mally urges the pawl 34 in a clockwise direction
out in» the following description and claims and 50 against a stop lug li‘ic formed in the extension
[0b.
illustrated in the accompanying drawing, which
disclose, by way of example, the principle of the
The member 24' rotates continually in the di
invention and the best mode; which has been
contemplated, of applying that principle.v
The single ?gure of drawings represents a ver
rection of the arrow while thelmachine is in use
and if a key H1 is depressed the pawl 32 will be
rockedin a clockwise direction through engage
tical section of a power type bar operating mech
ment of‘ the nose of pawl 34 with tail 32a of the
anism for use in a typewriting machine.‘
pawl 32 thereby releasing the three-arm dogu3l
which will be rocked- counterclockwise by the
_‘
The machine is provided with theusual keys
Hi which are pivoted on the fulcrum wire II and
urged in a counterclockwise direction by springs
spring 33 to engage tooth 3la‘with vthe member
24. Thereafter, the dog 3| will be drawn to the
2,407,195
3
left, rocking the actuating lever 21 ina counter
clockwise direction and drawing down the link
28. This, of course, rocks the sub-lever l4 clock- ‘
wise and actuates the type bar 2| to printing
position. Shortly before the type bar reaches the
printing position, the inclined edge 3|c ‘on the
4
According to the present invention, means is
provided to enable the operator to relatch the
dogs 3| regardless of the extent to which the type
bars may have been operated before the motor
stalls. For the purpose of freeing the dogs from
the member 24 and relatching them, there is
provided a resetting member 31 in the form of
a bail having side arms 31a and carried by a
shaft 38 journalled in the framework. One arm
member 24 into relatching position by the latch
32 as shown by the dot-dash line. The stroke of 10 31a of the bail 3'! is connected by a link 39 to
an arm of a three armed lever 40 attached to
the type bar is completed by momentum as the
a stub shaft 4| journalled in and extending ex
bar 36 preferably will be positioned so that the
teriorly of the base of the machine. A hand
dog 3| is disengaged from member 24 and re
lever 42 is secured to a stub shaft 4| within con
latched at a predetermined time before the type
bar 2| completes its stroke to printing position.
15 venient reach of the operator. The cross bar of
the bail is slightly cylindrically concave with an
The springs l5 and 29 restore the type bar and
nose of the dog 3| engages the beveled edge of a
cross bar 33 which cams the dog 3| clear of the
the operating mechanism connected thereto to
the position shown in the drawing thereby bring
ing the tail of pawl 32a back into cooperation
with pawl 34. If the operator holds the key de
pressed, the end of the tail 32a of pawl 32 instead
axis through the center of the shaft 25 when the
bail 31 is in the dot-dash position. In this posi
tion the concave surface engages the third arm
3id of the dog 3|.
Normally, while the machine is in operation,
the bail 31 is held in the position of the drawing
by a toggle spring 43 hooked around a ?xed pin
of moving past the nose of pawl 34 will engage
the side of said pawl and rock it counterclockwise
and a pin carried by one arm of the lever 40 which
in which position the parts will remain as long as
the-key is held depressed. Thus it is impossible 25 is held by the spring against the lower of two stop
pins 44 carried by the base of the machine.
to release the pawl 32 a second time without per
Let it be assumed that a type bar has only
mitting the key I0 to restore. When the key is
been partially operated due to a current failure so
released, the pawl 34 will snap over the tail of
that the dog 3| still engages member 24 with
the pawl 32 in readiness for another operation.
If it is desired to obtain repeated operation of a 30 the latch 32 resting on top of the arm 3|b. The
third arm 3|d of the dog 3| will have been
type bar or other actuated device, as sometimes
rocked counterclockwise so that the rounded nose
is the case, the pawl 34 may be omitted and the
thereof- extends across the broken line repre
extension ||lb may be shaped to directly engage
senting the curved surface of the bail 31. If now
the tail of pawl 32 so that said pawl will be
automatically released at the end of the restoring 35 the lever 42 is rocked counterclockwise by hand,
the bail 31 will be actuated in the same direction
movement to cause another operation with the
and the engagement of the curved surface of the
key held depressed.
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bail with the third arm 3|d will cause the en
As a general rule, the type bars are actuated
gaged dog 3| to be rocked back to latching posi4
through an arc of 90° and, in a power operated
machine, the mechanism is designed so that ap 40 tion thereby permitting the type bar and its
proximately the last 10° of the stroke of the
type bar is effected through momentum in print
ing lower case letters. In printing capital letters,
actuating mechanism to restore to normal posi
tion under the influence of the springs I5 and
29. If it should happen that a plurality of the
type bars have jammed together in the basket
and stalled the motor, the current may be turned
of]? from the motor and the lever 42 operated to
relatch all of the dogs 3| for the operated type
however, the mechanism may be arranged so that
the power mechanism is not released until the
type bar reaches, or is very close to, the printing
'point, thereby producing a somewhat heavier
bars. One or two of the type bars may now
blow. For this purpose, means may be provided
return to normal position if they are free. How
to shift the bar 36 downwardly and to the left
during a case shifting operation to enable dogs 50 ever, usually the type bars jam together so tight
ly that they must be freed one by one and
3| to remain in engagement with member 24 for
allowed to fall back to normal position.
a slightly longer time.
' The foregoing mechanism has many practical
Member 24 is driven by an electric motor con
advantages and features of utility other than
nected by a suitable extension cord to the nearest
electrical outlet. It is quite evident from the 55 functioning purely as a means of correcting the
troubles arising from current interruptions, such
drawing that, if the member 24 is not rotating,
as accidental disconnection of the plug from the
the depression of a key l0 will release the dog
outlet. For example, the lever 42 may be con
3| and the arm 3lb will be snapped under the
end of the pawl 32 and hold the pawl 32 disen
nected to the machine switch, if desired, so that
gaged. If this is done with several keys and then 60 rocking the lever to the position of the dot-dash
position results in turning off the current thereby
the power is turned on the machine, several type
relieving the stalled motor simultaneously with
bars will be operated together and so will jam in
the type basket in a tight mass and stall the
the release of the operating mechanism for the
driving motor.
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type bars which caused the motor to stall. The
It is not su?icient to turn off the current to the 65 lever'42 may be the usual switch lever or it may
actuate a separate switch 45 through a link
motor and disentangle the type bars from each
46 connected to the third arm of lever 40.
other since the dogs 3| will still be hooked over
In machines of this type, when the switch lever
the teeth in the member 24 and prevent the type
is turned to the off position, mechanism is pro
bars from being restored to normal position as
they are disengaged from each other in the type 70 vided to lock the keys against depression. The
basket. The dogs 3|, being inaccessible to the
locking of the keys in one form of machine is
operator, ordinarily cannot be reset conveniently
effected by means of a locking bar 41 pivoted at
to relatching position, making it necessary to send
48 to the base of the machine. When the switch
is turned to the off position the bar swings
for a serviceman before the machine can be re
stored to use.
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75 clockwise to prevent depression of the keys. In
' 2,407,195
5
the present ‘case, this result may be Lobtained by
a link 49 connected to lever 40 and lock-ing‘bar
41. Thus the lever 42 may be utilized toi-turn
oil’ the cur-rent and lock the keyboard ‘against
accidental depression of a key- while ire‘eingthe
jammed type bars and also resetting the dogs-3i‘
for the jammed type bars to- permit them ‘to
restore to
normal.
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It is ialsoi'po'ssible to use thebail ‘3‘1asia'm‘eans
6
operation may be made by-those skilledrin‘ the
art, ‘without ‘departing’ from the spirit of the
invention. It is the intention, therefore, to be
limited only as indicated by the scope of the fol
lowing ‘claims.
What is claimed is:
‘1. In combination with a power operating
mechanism for the type bars and other devices
of a ‘typewriting machine wherein there is pro
of discouraging or‘ ‘even preventing tampering 10 videda power driven actuator and a power oper
with the ‘machine; ‘It ‘has been found that in the‘
at'ing device for each type bar or device, each
absence ‘of ’ the person charged i‘withfthe respom‘
device'including means releasable‘ for operative‘
sibility Ffdr' the -‘ machine; such" as 5a; istenographer;
engagement with the “power driven actuator to
that unauthorized ‘persons who are} not'iskilled
actuate’ the type bar or device; means acting
in the use of-‘ma'chines cr-thisi‘type often} tamper
with“ ‘it ;‘causing1 damage‘ to; the‘ machine; i and
unnecessary wear fromunadthorized'usel. If ball
31- is ‘left in‘ ‘the position-of the‘ dot-dash lines
directly upon the releasable means ‘for disengage
ing the releasable means from the operating
member, and manual ineans'for operating the‘
atPaII-Tt'ime's, lexcept while thema'chineiis in use;
'2. In a power operating mechanism ‘for the“
actuable ‘devices ‘of a typewriter or other o?ic‘e,
machine controlled by keys in ‘which ‘the opera;
the ‘operation ‘of :a key fl‘? -.wi~ll have no effect;
latch-‘3i.l being merélyl'ro‘cked ran;
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If desired, a suitable lock maybe-provided
to-"hol‘dH-th‘ ""‘ver ‘421-? thelldbt-da'shi ‘position
of the i'dr-awi lwhich’ anatomy wouldh'ave the
effect- or‘ preventing releasing-i or the‘ dogs ~13“! but
alsoof ‘preventing depression of “a‘keyiahd turn‘
in‘goni‘ithe mo‘ton
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disengaging means;
tion of ‘the keys trips elements subsequently ei-‘
fective to cause said devices to beac'tuated by
power, means for moving said elements to restore
tripped and V incompletely operated elements _'to
untripped condition, and a manual member for
act'uating‘the restoring means.
1
The lock may
placed ‘Ti " any 'ls'uitabl'e ‘rela
3. A power mechanism for actuating the type
mm to ‘the dog release
‘but -ecn-_ ' bars and other devices or a typewritin‘g-‘machine,
venien‘tly ‘ may vconsist ‘o‘f ‘a i‘cohventid‘nal pin tum 30 comprising a-‘toothed actuator, an‘actuat‘ing lever
bier‘ lock 50 of’ the “Ya1‘é"’*‘7type having‘ a‘barrel
connected ‘to the ‘type “bar, a dog ‘mounted on ‘the
settable ‘to either‘ or two positions “130*? ‘apart
actuating ‘lever and having a tooth engageable
wit-h a tooth of the actuator to 'enablethe actu
ini-bdthi
pin 50c (if-which
‘on the 'barreli's
the key may
“mdve‘dj1180"‘-“
withdrawn.‘
mm the
*
, ating lever to be operated by the actuator, release
position’ or 1 they ‘drawing ‘When- the‘; key‘ is i ‘turned
able means to holdth‘e dog clear of ‘the actuator,
to rlo’cking'i-posltion and "by-"engaging the edge of
one F'o'f ‘the~"arfns' or‘ lever Ml, rocks theglatter
counterclockwise to ‘place ‘bail 31in ‘the-‘dog
means to disengage the dog from ‘the actuator
and‘restore said dogto'th'eiin?uence of ‘theholde
ing means, and a manual member for actuating
release position denoted by the ~‘dbt-das‘h ‘lines in
the disengagingmeans.
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the l'drawing.v When bail 131 ‘is locked in‘tlii‘s posi 4‘0
a ‘power mechanism‘ior ‘typewriters and
tion the ‘machine can-not be‘ operated-by power
‘like‘mach'in‘es, a power operated actuating mem
since none ‘of the dogs 3-] can
released ‘by
ber,~a'n actuating element engageable withthe “ac
means of keys I0. Even if ‘the locking bail ‘or
tuating member for operation ‘by :said ‘member,
bar 41, switch 45 and the connections to‘iever
means for engaging said element ‘with said -mem-'
4e are omitted or tampered with, the “machine is 4-5 ber, ‘means for automatically disengaging ‘said
still ‘effectively locked against ‘casual "tampering;
element 'from ‘said *member after said ‘element
There is (some psychological advantage ‘in , the
has-been actuated a'predet‘ermined ‘extent ‘by "said
member, and manually'operable means for ‘posi
use of bar-1:4’! and the switch connectionsfhowé
ever.,~because- a person bent‘ on ‘tampering’wih be I t‘ivelyjdi‘sengag'ing ‘said element ‘from ‘said ‘mem
discouraged ‘by fiinding ‘both ‘ the ‘keys and “switch ‘ ‘50 her, without disturbing‘s‘aid memberjin uneven;
locked whereas, without these'features; ‘there
the ‘element is not ‘moved ‘by said ‘member far
‘may be sometemptation to ‘try to “?ndo‘u‘t ‘why
enough for the automatic ‘disengaging means‘ to‘
a machine ‘that lis-n‘ot ‘obviously-‘locked will not
take ‘e?e'ct.’
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'5. In \a power-operating ‘mechanism "for a‘type
i It will be understood that the ‘keyboard ,l-l‘ock- f 55 bar or'other device to‘be actuated, ‘a ‘powe‘r'driven
work.
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ing bail or an 41, jithe'io‘ck -50_“and the ‘switch
45 are not essential features, "but Lmerely advan
operating member, an ‘actuating device ‘adapted
towbe \oper-atively engaged with said member,
tageous under some conditions,‘ ‘since the {spring
'43 andstop lpins M ‘constitute a means ‘for ‘hold
means‘lfor automatically disengaging “said device
from‘r-‘sa‘id ‘member after a -»full operation of said
ing the ‘member "31 ‘in 5a ‘posit-ion ;to prevent re- 1 60 device ‘by said member, and ‘a supplemental dis
lease ‘of ‘dogs 31 by lkeys ‘Hi. If "desired, the ‘key
engaging‘means "for operating-‘said 'devi‘c‘e to~‘dis
‘of-lock 59 may ‘be used‘ia‘s a manual "means of
engage ‘it 1from said member‘ without V‘di‘sturb'ing
operating the member, dispensing with'the lever
42, ‘by i‘sim‘ply connecting ‘pin T'a'il‘to ‘one of the
said'member when said device hasnot ‘been'oper- ‘
ated b'y‘fsa‘id member ‘far ienoug‘h'to be autoinati»
arms o'f'ileverll) by means‘o'f a suitable‘link. It 65 cally ‘disengaged ‘by “the automatic ‘disengaging
will be understood, therefore'that the invention
may be ampli?ed ‘in the-f ways disclosed and‘ a1
tered as‘ required to suit-different“situations‘whim
out departing ‘from the basic‘ features disclosed‘.
means;
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6. In a power operating mechanism for theitype
bars andio‘ther devices or ‘a typewriting machine,
alro‘tary actuator,‘ actuating devices ‘connected ‘to
While there 1‘have Tibeen‘ishown‘ and ‘described ‘ 70 ‘thetype bar'slan'dother devices of'thetypewriting
and pointed ‘out the fundamental novel features
machine and adapted to lbe‘ilcoup‘led selectivel'yto
ofthe ‘invention as "applied to a single embodi
ment it will be understood that various omis
sions and substitutions and changes in the form
the ‘actuator ror selective ‘operation ‘of-‘said type
bars and other devices of the typewriting ma
chine, means for automatically uncoupling each
and details of the device illustrated and in its 75 of the actuating devices when the operated type
2,407,195.
7
bar or other device has been actuated a su?icient
extent, and means common to all of said devices
and operable to uncouple from ‘said actuator,
without disturbing said actuator, any and all of
the actuating devices which may be incompletely
operated.
.
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; "7. In a power mechanism for typewriters, a ro
tary toothed power driven actuator; actuating
devices for the type bar mechanisms and other
with a tooth of the actuator to enable the actu
ating lever to be operated by the actuator, re
leasable means to hold the dog clear of the actu
ator, means to disengage the dog from the actu
ator'and restore said dog to the in?uence of the
holding means, a manual member for actuating
the disengaging means, and means to hold the
dog disengaging means in disengaging position to
prevent engaging said dog with said actuator.
13. A power mechanism for actuating the type
mechanisms of a typewriter, each device includ-v 10
bars and other devices of a typewriting machine,
ing a toothed element engageable with a tooth of
comprising a toothed actuator, an actuating lever
the actuator to couple the associated device to
the actuator for operation by the latter; means
connected to the type bar, a dog mounted on the
actuating lever and having a tooth engageable
coacting with the toothed elements after a pre
determined extent ofmovement of the elements 15 with a tooth of the actuator to enable the ac
by the actuator to automatically disengage the
tuating lever to be operated by the actuator, re
leasable means to hold the dog clear of the actu
elements from the actuator, and a member com
ator, a member operable to restore the dog to con
mon to said toothed elements and shaped to be
engageable with any of said elements in any of
trol of the releasable means, and means to hold
their successive operating positions, said member
said member in the position in which the dog is
being movable from a normally inoperative posi
fully restored to prevent engagementv of the dog
tion to a position in which said member holds all
said elements out of engagement with said actu
ator.
with the actuator.
restore the released device and settable to pre
vent release of said device when the releasing
ing said element from said member in the event
the element is not moved by said member far
enough for the automatic disengaging means to
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14. In a power mechanism for typewriters and
like machines, a power operated actuating mem
_. 8. In a power operating mechanism for the 25 ber, an actuating element engageable with the
actuating member for operation by said member,
type bars and other devices of a typewriting ma
means for engaging said element with said mem
chine, a power operating member, a power‘actu
ber, means for automatically disengaging said ele
ated device releasable for engagement with said
member and connected to the type bar or other
ment from said element after said element has
device to be actuated, means to release said de 30 been actuated a predetermined extent by said
member, manually operable means for disengag
vice, and normally ine?ectivelmeans operable to
means is operative.
, 9. In a power operating mechanism for the‘ 35 take effect, and means to hold the manually op
erable means in a position‘ to prevent subsequent
type bars and other devices of a typewriting ma
engagement of the actuating element with the
chine, a power operating member, a power actu
ated device releasable for engagement with said
actuating member to thereby prevent operation
member and connected to the type bar or other
of the power mechanism.
15. In a power operating mechanism for a type
device to be actuated, means. to release said de 4.0
vice, and locking means movable to a position to
bar or other device to be actuated, a power driven
restore the power device and prevent a second re
operating member, an actuating device adapted
lease of said device.
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10. In combination with a power operating
to be operatively engaged with said member,
means for automatically disengaging said device
mechanism for the type bars and other devices 45 from said member after a full operation of said
of a typewriting machine wherein there is provid
device by said member, a supplemental disengag
ed a power driven actuator and a power‘ operat
ing means for disengaging said device from said
ing device for each type bar or device including
member when said device has not been operated
means releasable for operative engagement with
by said member far enough to be automatically
the operatingmember to actuate thetype bar or 50 disengaged by the automatic disengaging means,
device; means for disengaging the releasable
and means to hold the supplemental disengag
ing means in a position to prevent engagement
means from the operating member, a manual
member for operating the disengaging means,
8f the actuating device with the operating mem
and means to hold said manual member in a po
sition in which the releasable means is prevented 55
fromengaging said'actuator.
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11. In a power operating mechanism for the
actuable devices of- a typewriter or other o?ice
machine controlled by keys in which the opera
er.
16. In a power operating mechanism for the
type bars. and other devices of a typewriting'ma
chine, arotary actuator, actuating devices con
nected to the type :bars'and other devices of the
typewriting machine and adaptedto be coupled
tion of the keys trips elements subsequently ef 60 to the actuator for operation of said type bars
and other devices of the typewriting machine,
fective tocause said devices to be actuated by
means for automatically uncoupling each 'of the
power, means to restore the tripped elements
_ to untripped condition, a-manual member for
actuating devices when the type bar or other
actuating the restoring means, and means to hold
device has been actuated a su?icient extent, means
said manual member in a position to prevent trip 65 common to all of said devices and operable to
uncouple from said actuator any and all of the
ping of any of said elements by means of the
keys.
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actuating devices which may be incompletely op
12. A power mechanism for actuating the type
erated, and means to hold-the second uncoupling
means in uncoupling position to prevent opera
bars and other devices of a typewriting machine,
comprising a toothed actuator, an actuating lever 70 tion of any of the actuating devices by the actu
ator.
connected to the type bar, a dog mounted on the
actuating lever‘ and having ‘a tooth engageable
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RICHARD VON REPPERT;
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